disp: msm: sde: set connector lm_mask for dp display

This change sets lm_mask for dp connector based on
number of LMs allocated by RM. This mask will be
used during rm allocation and validation of dcwb
mixers for dp display.

Change-Id: I271af03da560587faf17446471bd6b81bb9e809b
Signed-off-by: Mahadevan <quic_mahap@quicinc.com>

msm/dp/dp_drm.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -419,6 +420,11 @@ int dp_connector_get_mode_info(struct drm_connector *connector,
 		DP_ERR("error getting mixer count. rc:%d\n", rc);
 		return rc;
 	}
+	/* reset dp connector lm_mask for every connection event and
+	 * this will get re-populated in resource manager based on
+	 * resolution and topology of dp display.
+	 */
+	sde_conn->lm_mask = 0;
 
 	topology->num_enc = no_enc;
 	topology->num_intf = single_intf;